af-code-simplify

A command for making recently changed code easier to read and maintain while keeping its behavior unchanged.

In plain words
What is it for?
Use it to simplify deeply nested logic, long functions, unclear names, repeated code, and unused code, then check the result with tests and a build.
Why use it?
It removes unnecessary complexity and duplication without changing what the program does.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/chankov/agent-fleet/af-code-simplify
Clone the repo
git clone --depth 1 https://github.com/chankov/agent-fleet
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 195 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00011 $0.00195
Opus 5 $0.00005 $0.00097
Sonnet 5 $0.00002 $0.00039
Haiku 4.5 $0.00001 $0.00019

Measured 2d ago against content hash aeec4640fc46, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

af-code-simplify scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.versions/0.0.1/.opencode/commands/af-code-simplify.md · 17 lines

What it actually says

Invoke the code-simplification skill via the skill tool.

Simplify recently changed code, or the scope specified in $ARGUMENTS, while preserving exact behavior:

  1. Read the project's agent instructions and study project conventions.
  2. Identify the target code: recent changes unless a broader scope is specified.
  3. Understand the code's purpose, callers, edge cases, and test coverage before touching it.
  4. Scan for simplification opportunities: deep nesting, long functions, nested ternaries, generic names, duplicated logic, or dead code.
  5. Apply each simplification incrementally and run relevant tests after each change.
  6. Verify tests pass, the build succeeds, and the diff is clean.

If tests fail after a simplification, revert only that simplification and reconsider. Invoke code-review-and-quality via the skill tool to review the result.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 17 lines · 11 tokens per session scan A aeec4640fc46

Subscribe to this mod's changes

af-code-simplify is a command published in the GitHub repository chankov/agent-fleet (10 stars, last pushed 6d ago), licensed MIT. It adds 11 tokens to every session and 195 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.